How High Is A 3 Step Riser. In a given run of stairs, the greatest step height and the smallest step height should not vary more than. The variation between the risers on the stair is 3/8 inch.
how tall should the steps be on a stair rise and run? The variation between the risers on the stair is 3/8 inch. the top rail should be parallel to the floor or slope of a walkway at a vertical height of not less than 900 millimetres above the standing level of a walkway or platform.
The variation between the risers on the stair is 3/8 inch. more exactly, no more than 7 3/4 inches (19.7cm) for the riser (vertical) and a minimum of 10 inches (25.4cm) for the tread (horizontal or step). How high is a 10 step ladder? 2 risers are boards that cover the vertical distance between stair treads.;
